code: def grab(cls):
      return np.zeros((8, 8, 3), np.uint8)
  
file_path: imageio/tests/test_grab.py
imports: import sys
  import numpy
  from pytest import raises
  import imageio.v2
  import imageio.plugins.grab
label_desc: Use image node_id 1 for calling the FakeImageGrab obj's underlying member method code with example usage: obj.grab(cls) and returns: np